(57) A medical device is configured and operable for removing a defined shape of soft tissue from a target tissue layer in an eye thereby creating a matching channel with predetermined geometry and orientation between two side walls of the target tissue layer to enable drainage of fluid from the eye through the channel, the device comprising coaxial outer and inner elongated members extending along axis X;
said outer member comprising:
- a first distal part having a first open distal end and configured for sticking to said target tissue layer during forward axial movement of the outer member, and
- a first proximal elongated part housing the inner member;

said inner member being configured to be rotated and projected distally, along said axis X, through said first open distal end of the outer member, the inner member comprising:
- a second distal part having a second open distal end having a round cutting edge of a first diameter, the round cutting edge being configured to attach to said target tissue layer and cut said defined shape of the soft tissue from the target tissue layer while rotating and distally progressing, thereby creating said channel formed as a hole through the target tissue layer, and
- a chamber extending proximally inside the inner member from said second open distal end of the second distal part for a predetermined length, the chamber being configured to receive and retain said removed soft tissue in an intact form during said rotating and distally progressing of the inner member, thereby providing a validation and authentication to volume and shape of the corresponding channel created inside the target tissue layer.